175 lines
5.5 KiB
Ada
175 lines
5.5 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- S Y S T E M . O S _ I N T E R F A C E --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2001-2020, AdaCore --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Version of System.OS_Interface for LynxOS-178 (POSIX Threads)
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package body System.OS_Interface is
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------------------
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-- Current_CPU --
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------------------
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function Current_CPU return Multiprocessors.CPU is
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begin
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-- No multiprocessor support, always return the first CPU Id
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return Multiprocessors.CPU'First;
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end Current_CPU;
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--------------------
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-- Get_Affinity --
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--------------------
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function Get_Affinity (Id : Thread_Id) return Multiprocessors.CPU_Range is
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pragma Unreferenced (Id);
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begin
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-- No multiprocessor support, always return Not_A_Specific_CPU
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return Multiprocessors.Not_A_Specific_CPU;
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end Get_Affinity;
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---------------
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-- Get_CPU --
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---------------
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function Get_CPU (Id : Thread_Id) return Multiprocessors.CPU is
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pragma Unreferenced (Id);
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begin
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-- No multiprocessor support, always return the first CPU Id
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return Multiprocessors.CPU'First;
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end Get_CPU;
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-------------------
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-- Get_Page_Size --
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-------------------
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SC_PAGESIZE : constant := 17;
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-- C macro to get pagesize value from sysconf
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function sysconf (name : int) return long;
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pragma Import (C, sysconf, "sysconf");
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function Get_Page_Size return int is
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begin
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return int (sysconf (SC_PAGESIZE));
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end Get_Page_Size;
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-----------------
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-- To_Duration --
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-----------------
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function To_Duration (TS : timespec) return Duration is
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begin
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return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
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end To_Duration;
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------------------------
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-- To_Target_Priority --
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------------------------
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function To_Target_Priority
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(Prio : System.Any_Priority) return Interfaces.C.int
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is
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begin
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return Interfaces.C.int (Prio);
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end To_Target_Priority;
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-----------------
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-- To_Timespec --
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-----------------
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function To_Timespec (D : Duration) return timespec is
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S : time_t;
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F : Duration;
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begin
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S := time_t (Long_Long_Integer (D));
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F := D - Duration (S);
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-- If F is negative due to a round-up, adjust for positive F value
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if F < 0.0 then
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S := S - 1;
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F := F + 1.0;
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end if;
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return timespec'(tv_sec => S,
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tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
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end To_Timespec;
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-------------
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-- sigwait --
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-------------
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function sigwait
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(set : access sigset_t;
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sig : access Signal)
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return int
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is
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function sigwaitinfo
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(set : access sigset_t;
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info : System.Address) return Signal;
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pragma Import (C, sigwaitinfo, "sigwaitinfo");
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begin
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sig.all := sigwaitinfo (set, Null_Address);
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if sig.all = -1 then
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return errno;
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end if;
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return 0;
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end sigwait;
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--------------------
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-- Get_Stack_Base --
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--------------------
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function Get_Stack_Base (thread : pthread_t) return Address is
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pragma Warnings (Off, thread);
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begin
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return Null_Address;
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end Get_Stack_Base;
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------------------
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-- pthread_init --
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------------------
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procedure pthread_init is
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begin
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null;
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end pthread_init;
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end System.OS_Interface;
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